Moving mailbox: {0} ({1}) to database: {2}. This will only modify the mailbox's Active Directory configuration. Mailbox content ...

Moving mailbox: {0} ({1}) to database: {2}. This will only modify the mailbox's Active Directory configuration. Mailbox content might be lost, and the mailbox won't be accessible until the changes are complete. You're moving this mailbox to an earlier version of Exchange, which will result in the loss of some features and data available only in Exchange 2010.